Transcript Seeds and Growing Plants

Seeds and Growing Plants
Parts of a plant
Function of
plant parts
Parts of a flower
What are seeds?
Parts of a seed – seed coat
• Why do seeds have a seed
coat?
Why do seeds
have a seed
coat?
Why are seeds so different?
Shape
Size
Colour
Texture
Seed coat texture
• Cactus seed under a powerful microscope
Parts of a seed – Inside the seed
Parts of a seed
First leaves
Epicotyle = stem
What do seeds need to
GERMINATE?
Oxygen
- Growth
Sun
- Energy for PHOTOSYNTHESIS
Temperature – Cold? Hot? Warm?
Water
- Photosynthesis and growth
GERMINATION
What is germination?
Steps:
1.
Seed coat breaks
2.
Radicle becomes
ROOT
3.
Hypocotyl and
epicotyl become the
STEM
4.
First leaves grow =
PHOTOSYNTHESIS
First leaves
PARTS OF A SEED - INSIDE
Plants need NUTRIENTS
Carbon
Hydrogen
Oxygen
Soil nutrients
Soil nutrients
Nitrogen – Growth, photosynthesis
Phosphorus – photosynthesis, flowering
Potassium – build proteins, prevent disease
Calcium – Strong cells
Magnesium – Photosynthesis
Sulfur - build proteins and produce food
Soil quality - pH
pH=7